Are you also able to load data via the GDAL driver?
If so you could then try to show nodata using raster styling.
e.g.: make sure that Nodata is not set to transparent: go to the
raster's layer properties -> transparency, untick nodata value.
Then style in symbology settings.
Best regards,
Aron
On 04-09-2023 09:57, Richard Duivenvoorde via QGIS-Developer wrote:
Hi,
My colleague is creating netcdf as output of some other modelling
software, and viewing/styling it in QGIS.
In some places the modelling software goes awry and produces NaN's in
de netcdf.
Anybody an idea to create a visualisation (in QGIS) to find out WHICH
part/cell's contain a NaN?
output of ncdump:
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0,·
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, NaNf, NaNf, NaNf,
0, 0,·
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0,·
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0,·
0, 0, 0, 0, 0, 0,
Found:
https://github.com/lutraconsulting/MDAL/blob/master/mdal/frmts/mdal_netcdf.cpp#L100-L102
So apparently in MDAL this becomes
"std::numeric_limits<double>::quiet_NaN"
But how to find these in QGIS?
Looking in Layer Styling I could use non-numbes (like None, NaN or
whatever) in the inputs.
Same in Mesh calculator.
Any idea appreciated!
Regards,
Richard Duivenvoorde
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Email Signature Kind Regards,
Aron Gergely
+31 (0) 6 38 70 97 66
*Rasterra* | www.rasterra.nl
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